The cruise ship MV Grand Explorer, operated by Ocean Vista Cruises, departed from the port of Santa Cruz de Tenerife in the Canary Islands in the early hours of May 22, 2024. This departure followed the successful completion of an extensive evacuation and health monitoring operation coordinated by the World Health Organization (WHO) in response to a Hantavirus outbreak identified on the vessel.

The ship, which had been docked in Tenerife since May 17, initiated emergency protocols after a cluster of six confirmed Hantavirus cases among passengers and crew members was reported. Health authorities, working in conjunction with the WHO, determined that immediate action was necessary to contain the potential spread and ensure the safety of all individuals on board. The incident drew international attention due to the rarity of such outbreaks on passenger vessels and the potential implications for global public health protocols.

The WHO-led operation focused on a multi-pronged approach to manage the crisis:

  • Identification and Isolation: All confirmed cases were promptly isolated and transferred to specialized medical facilities in Tenerife for treatment and monitoring.
  • Contact Tracing: An intensive contact tracing effort identified approximately 120 passengers and crew members who had been in close proximity to the affected individuals.
  • Medical Assessment and Evacuation: These close contacts, along with individuals exhibiting any potential symptoms, underwent thorough medical assessments. A total of 85 passengers and 35 crew members were subsequently disembarked and transferred to isolation units and observation facilities on the island, or repatriated under controlled medical supervision.
  • Sanitation: The vessel underwent a rigorous deep cleaning and disinfection process, supervised by international health inspectors, to eliminate any potential viral contaminants, particularly targeting areas prone to rodent activity. Hantavirus is typically transmitted to humans through contact with infected rodent droppings, urine, or saliva.

Ocean Vista Cruises confirmed in an official statement that the remaining 1,850 passengers and 700 crew members had been cleared by health officials, showing no signs of infection and having passed all required health screenings. The cruise line emphasized its adherence to stringent health and safety guidelines throughout the process. The MV Grand Explorer is now en route to its home port in Genoa, Italy, where it is scheduled for further operational checks and crew rotation, with its subsequent voyages temporarily suspended.

This incident underscores the complex challenges of managing infectious disease outbreaks in confined, international settings like cruise ships. The rapid intervention by the WHO and local health authorities in Tenerife prevented a wider public health emergency. Monitoring of the evacuated individuals is expected to continue for several weeks, aligning with the typical incubation period of Hantavirus, which can range from one to eight weeks. Health organizations worldwide are reviewing the protocols established during this incident to enhance preparedness for similar future events.